On 06/25/2013 10:22 AM, Mike Travis wrote: > > On 6/25/2013 12:38 AM, Ingo Molnar wrote: >> >> * Nathan Zimmer <nzimmer@xxxxxxx> wrote: >> >>> On Sun, Jun 23, 2013 at 11:28:40AM +0200, Ingo Molnar wrote: >>>> >>>> That's 4.5 GB/sec initialization speed - that feels a bit slow and the >>>> boot time effect should be felt on smaller 'a couple of gigabytes' >>>> desktop boxes as well. Do we know exactly where the 2 hours of boot >>>> time on a 32 TB system is spent? >>> >>> There are other several spots that could be improved on a large system >>> but memory initialization is by far the biggest. >> >> My feeling is that deferred/on-demand initialization triggered from the >> buddy allocator is the better long term solution. > > I haven't caught up with all of Nathan's changes yet (just > got back from vacation), but there was an option to either > start the memory insertion on boot, or trigger it later > using the /sys/.../memory interface. There is also a monitor > program that calculates the memory insertion rate. This was > extremely useful to determine how changes in the kernel > affected the rate. > Sorry, I *totally* did not follow that comment. It seemed like a complete non-sequitur? -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
